# Malaysia SPM Form 5 Physics - Electromagnetism

1.1 Introduction to Magnetism
1.2Straight Wire and Coil
1.3 Solenoid
1.4 Uses of Electromagnet
2.1 Catapult Force
2.2 Application of Catapult Force
3.1 Electromagnetic Induction
3.2 DC and AC Generator
4.1 Transformer
4.2 Transformer - Calculation
5.1 Generation and Transmission of electricity

# Generation and Transmission of Electricity

The SPM Physics Workbook is developed under the One-School.net Free Books Project. The content of this book is strictly follow Malaysia SPM (Sijil Pelajaran Malaysia) syllabus. The aim of this project is to provide a complete electronic supplementary network for students to develop self-learning skills by breaking the spoon-feed rituals and to encourage them to compile educational information from the Internet.
1. Which of the following is not a renewable energy?
Hydro energy
Biomass
Geothermal energy
Nuclear energy

2. Which of the following is not the advantage of using National Grid Network
Reduces power lost during transmission.
Electricity supply is more stable and reliable.
More secure.
Maintenance and repairing work can be done at anytime.

3. It is known that some electrical energy will loss during the transmission due to the resistance in the transmission cable. The energy loss in a transmission cable is

directly proprotional to the square of the current in the cable
directly proprotional to the current in the cable
inversely proportional to the square of the current in the cable
inversely proportional to the current in the cable

4. Which of the following is NOT TRUE about the disadvantages of using fossil fuel as a source of energy?
It is a non-renewable energy
It pollute the air
It releases a lot carbon dioxide when it is burned
It is very expensive

5. Which of the following is NOT the problems involving electricity transmission?
Power loss during transmission.
Pylons may be strucked by lightning.
The high voltage transmission cable is very dangerous.
The high voltage cable may kill those birds accidentally step on it.

6. In a transmission of electricity from place A to place B, the electrical energy is transmitted at the rate of 100kW and the potential difference across the cable is 20kV. Find the power loss in the transmission if the resistance of the cable is 5 Ohm.
80MW
125W
100kW
140W